‘Resource partitioning’ is an important mechanism which promotes

Gause's law is true only when

Which of the following is an example of a defence used by plants against herbivores?

$I.$ Production of caffeine, tannin quinine

$II.$ More production of non-woody tissues

$III.$ Productions of hairs, thorns, spines

$IV.$ Production of hormone-like chemicals that interfere with insect metamorphosis

Select the correct pair

In an association of two animal species, one is a termite which feeds on wood and the other is a protozoan Trichonympha present in the gut of the termite. What type of association they establish ?

Choose correct group for commensalism from the following

$(a)$ The cattle egret and grazing cattle

$(b)$ Barnacle balanus and Barnacle chathamalus

$(c)$ Goat and Abingdon turtle from Galapagosisland

$(d)$ Barnacles growing on the back of whale

Which one of the following is most appropriately defined?